Penn is still a baby in MMA at 28... he has lots of years ahead of him.

I'd like to see him stay at 155.

i think 155 best suits BJ

as well....

155 will be better for him because won't have to go against #2 pound 4 pound in the world once he wins his title back GSP....Matt Hughes will also be a problem for him and so would Fitch....

The only possible bad match ups for him would be Frank Edgar & Tyson Griffin because they are both explosive strikers and wrestlers and they will put his "improved" conditioning to the ultimate test because all of there fights are all out fast paced WARS!!......